package com.mark.crawler.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;

/**
 * @Description :    spring工具类
 *   通过该工具类可以进行获取bean的实例
 * @Author :  Markburt
 * @CreateDate :  2020/3/7$ 下午 08:51$
 * @UpdateUser :  Markburt
 * @UpdateDate :  2020/3/7$ 下午 08:51$
 * @UpdateRemark :  Project Build
 * @Version :  1.0
 */
public class SpringUtil {

    private static ApplicationContext applicationContext;

    /**
     * 设置applicationContext
     * @param applicationContext
     * @throws BeansException
     */
    public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringUtil.applicationContext == null) {
            SpringUtil.applicationContext = applicationContext;
        }
    }


    /**
     * 获取applicationContext
     * @param
     * @throws
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }


    /**
     * 通过name获取 Bean.
     * @param
     * @throws
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }


    /**
     * 通过class获取Bean.
     * @param
     * @throws
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }


    /**通过name,以及Clazz返回指定的Bean
     *
     * @param
     * @throws
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}
